According to TMZ, the Los Angeles County Department of Children and Family Services has opened an investigation into the care and safety of Dream Kardashian. The investigation is reportedly focused on Chyna's alleged drug use, but is also related to the restraining order Chyna filed against her ex back in July, when she accused Rob of abusing her.

In official court documents, Chyna referred to Rob as "a jealous man," and described an incident during which Rob punched her and was so "out of control" that she had to hide from him in a locked bathroom.

"I was terrified and my legs were hurt," read court documents obtained by Page Six. "I was sore and had a hard time walking for days."

Chyna was awarded a restraining order against Rob in July, which prevents her ex from being near her or posting any more revenge porn of her.